This content is not included in your SAE MOBILUS subscription, or you are not logged in.
A Study on the Application of a Reduced Chemical Reaction Model to Motored Engines for Heat Release Prediction
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 01, 1992 by SAE International in United States
Annotation ability available
We investigated the ability of a reduced chemical kinetic model of 18 reactions and 13 active species to predict the heat release for a blend of primary reference fuels with octane rating 63 in a motored research engine. Given the initial fuel-air mixture concentration and temperature, the chemical kinetic model is used to predict temperature, heat release and species concentrations as a function of time or crank angle by integrating the coupled rate and energy equations. For comparison, we independently calculated heat release from measured pressure data using a standard thermodynamic model. We found that: i) the induction time of heat release can be matched when the rate parameters of the RO2· isomerization reaction are chosen between the values suggested for iso-octane and n-heptane; ii) the rate of heat release predicted by the kinetic model is much greater than that calculated from the experiment; and iii) the kinetic model underpredicted the specific heat release by more than 50%. Analysis of the chemical kinetic model showed that in its present form, the specific heat release could not be matched. The original chemical kinetic model was extended by adding 11 reactions and 5 active species to account for the oxidation of aldehydes, olefins, carbonyls and the formation of CO. This improved the match of both the specific heat release and the overall heat release profile, as well as providing new capabilities for predicting carbon monoxide production which is a key indicator of preignition chemical activity.
CitationLi, H., Miller, D., and Cernansky, N., "A Study on the Application of a Reduced Chemical Reaction Model to Motored Engines for Heat Release Prediction," SAE Technical Paper 922328, 1992, https://doi.org/10.4271/922328.
- Cernansky, N.P. Green, R.M. Pitz, W.J. Westbrook, C.K. 1986 “Chemistry of Fuel Oxidation Preceding End Gas Autoignition,” Comb. Sci. Tech. 50 3
- Henig, Y. Addagarla, S. Miller, D.L. Wilk, R.D. Cernansky, N.P. 1989 “Autoignition of n-Butane/lsobutane Blends in a Knock Research Engine,” SAE Paper No. 890157 SAE Trans. 98
- Addagarla, S. Henig, Y. Wilk, R.D. Miller, D.L. Cernansky, N.P. 1989 “Effect of Fuel-Air Mixture Stressing on Preignition Heat Release in a Knock Research Engine,” SAE Paper No. 892082 SAE Trans. 98
- Addagarla, S. Miller, D.L. Cernansky, N.P. Green, R.M. 1989 “The Investigation of The Effects of Inlet Conditions on Autoignition in a Motored Knock Research Engine,” Fall Meeting of the Western States Section/ The Combustion Institute Livermore, CA. 23-24 October
- Addagarla, S. Filipe, D. Miller, D.L. Cernansky, N.P. Green, R.M. 1991 “The Effects of Speed and Manifold Pressure on Autoignition in a Motored Engine,” SAE Paper No. 910566 SAE Trans. 100
- Filipe, D.J. Li, H. Miller, D.L. Cernansky, N.P. 1992 “The Reactivity Behavior of n-Heptane and Isooctane Blends in a Motored Knock Research Engine,” SAE Paper No. 920807
- Ferguson, C.R. Green, R.M. Lucht, R.P. 1987 “Unburned Gas Temperatures in an Internal Combustion Engine. II: Heat Release Computations,” Comb. Sci. Tech. 55 63
- Pitz, W.J. Westbrook, C. K. Proscia, W.M. Dryer, F.L. 1984 “A Comprehensive Chemical Kinetic Reaction Mechanism for the Oxidation of n-Butane,” Twentieth Symposium (International) on Combustion 831 The Combustion Institute Pittsburgh
- Leppard, W.R. 1985 “A Detailed Chemical Kinetics Simulation of Engine Knock,” Comb. Sci. Tech. 43 1
- Pitz, W.J. Wilk, R.D. Westbrook, C.K. Cernansky, N.P. 1988 “The Oxidation of n-Butane at Low and Intermediate Temperatures: An Experimental an Modeling Study,” Spring Meeting of the Western States Section/ The Combustion Institute Salt Lake City, UT 21-22 March
- Warnatz, J. 1989 “Numerical Simulation of Ignition Processes,” Third International Conference on Numerical Combustion Antibes, France May
- Halstead, M.P. Kirsch, L.J. Prothero, A. Quinn, C.P. 1975 “A Mathematical Model for Hydrocarbon Autoignition at High Pressure,” Proc. Roy. Soc. A346 515
- Cox, R.A. Cole, J.A. 1985 “Chemical Aspects of the Autoignition of Hydrocarbon/Mixtures,” Combustion and Flame 60 109
- Hu, H. Keck, J. 1987 “Autoignition of Adiabatically Compressed Combustible Gas Mixtures,” SAE Paper No. 872110 SAE Trans. 96
- Chun, K.M. Heywood, J.B. Keck, J.C. 1989 “Prediction of Knock Occurrence in a Spark-Ignition Engine,” Twenty-Second Symposium (International) on Combustion 455 The Combustion Institute Pittsburgh
- Cowart, J.S. Keck, J.C. Heywood, J.B. Westbrook, C.K. Pitz, W.J. 1990 “Engine Knock Predictions Using a Fully-Detailed and a Reduced Chemical Kinetic Mechanism,” Twenty-Third Symposium (International) on Combustion 1055 The Combustion Institute Pittsburgh
- Hindmarsh, A.C. 1974 “Gear: Ordinary Differential Equation System Solver,” LLNL Report UCID-30001 Lawrence Livermore National Laboratory Livermore, CA.
- Taylor, C.F. Taylor, E.S. Livengoog, J.C. Russell, W.A. Leary, W.A. 1950 “Ignition of Fuels by Rapid Compression,” SAE Quarterly Transaction 4 2 232
- Halstead, M.P. Kirsch, L.J. Prothero, A. Quinn, C.P. 1977 “The Autoignition of Hydrocarbon Fuels at High Temperatures and Pressure - Fitting of a Mathematic Model,” Combustion and Flame 30 45
- Leppard, W.R. 1989 “A Comparison of Olefin and Paraffin Autoignition Chemistries: A Motored Engine Study,” SAE Paper No. 892081 SAE Trans. 98
- Glassman, I. 1987 Combustion Academic Press, Inc. New York, NY
- Cavanagh, J. Cox, R. A. 1990 “Computer Modeling of Cool Flames and Ignition of Acetaldehyde,” Combustion and Flame 82 15
- Ray, D.J.M. Waddington, D.J. 1973 “Gas Phase Oxidation of Alkenes - Part II. The Oxidation of 2-Methylbutene-2 and 2,3-Dimethylbutene-2,” Combustion and Flame 21 327
- Lund, C.M. 1978 “HCT - A General Computer Program for Calculating Time - Dependent Phenomena Involving One - Dimensional Hydrodynamics, Transport, and Detailed Chemical Kinetics” LLNL Report UVRL - 52504 Lawrence Livermore National Laboratory Livermore, CA
- Griffiths, J.F. Rose, D. Schreiber, M. Meyer, J. Knoche, K.F. 1992 “Novel Features of End - Gas Autoignition Revealed by Computational Fluid Dynamics,” Combustion and Flame